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Questions and Answers

What is the term for involving applying the brakes and then releasing them after the wheels lock up?

Drum Braking

Disc Braking

Stab Braking (correct)

Anti-lock Braking

Where must placards be placed?

On all four sides of a vehicle

Which figure shows the correct way to turn?

Figure B: slightly opposing traffic

Why should you signal continuously while turning?

You need both hands on the steering wheel to turn safely Signup and view all the answers

What distance should you look ahead while driving at highway speeds?

1/4 Mile Signup and view all the answers

On which type of fire can you use water?

Tires Signup and view all the answers

What is the purpose of retarders?

Help slow the vehicle while driving and reduce brake wear. Signup and view all the answers

What do convex mirrors do?

Show a wider area than flat mirrors show. Signup and view all the answers

What gear should you use on a long, steep downhill grade?

A lower gear than you would use to climb the hill. Signup and view all the answers

What should you do if unsure about overhead clearance?

Find another route that will not require driving under the object. Signup and view all the answers

Whenever you double your speed, your vehicle has about __ times the destructive power if it crashes.

Four Signup and view all the answers

What is the proper way to hold a steering wheel?

Both hands on opposite sides of the wheel. Signup and view all the answers

What is a good practice when driving at night?

Drive slowly enough to stop within range of your headlights. Signup and view all the answers

Which of the following will not prevent a fire during a vehicle inspection?

Checking battery fluid level Signup and view all the answers

Why is a broken exhaust system dangerous?

Poisonous fumes could enter the cab or sleeper berth. Signup and view all the answers

What should you do if a car approaches from behind but isn't visible in your next mirror check?

Wait until you are sure the car isn't in your blind spot. Signup and view all the answers

You must stop at a railroad grade crossing when?

The cargo makes a stop mandatory under state or federal regulations. Signup and view all the answers

What can happen if your brakes get wet while driving on a rainy day?

Trailer jackknife. Signup and view all the answers

"Implied consent" means that when you sign the application form, you:

Give your consent to be tested for alcohol in your blood. Signup and view all the answers

Which of these items should be tested while the vehicle is stopped?

Hydraulic brake Signup and view all the answers

Which statement is true about staying alert to drive?

Sleep is the only thing that can overcome fatigue. Signup and view all the answers

What typically results in serious skids?

Driving too fast for conditions. Signup and view all the answers

What should you do if you can't avoid driving through deep puddles or flowing water?

Gently putting on the brakes when driving through water. Signup and view all the answers

Which steering issue should be fixed before driving?

Steering wheel play--more than 10" (2 inches on a 20-inch wheel). Signup and view all the answers

Which is a true statement about double-clutching and shifting?

You can use the tachometer to tell you when to shift. Signup and view all the answers

What should you do if your drive wheels start to spin when you begin moving from a stop?

Take your foot off the accelerator. Signup and view all the answers

When driving a heavy vehicle and exiting a highway using an offramp that curves downhill, what should you do?

Slow down to a safe speed before the curve. Signup and view all the answers

Which action should you not take if a car suddenly cuts in front of you?

Honk and stay close behind the car. Signup and view all the answers

What do truck escape ramps help to avoid?

Damage to vehicles. Signup and view all the answers

When is the best time to adjust your mirrors?

Before you start a trip. Signup and view all the answers

How should you return to the pavement after driving onto the shoulder to avoid a crash?

If the shoulder is clear, stay on it until your vehicle comes to a stop. Then move back onto the pavement when it is safe. Signup and view all the answers

When must you sign a written vehicle inspection report?

If the previous driver noted any defects. Signup and view all the answers

What should your tire tread provide when driving in cold weather?

Enough traction to steer and push the vehicle through snow. Signup and view all the answers

How often must CDL medical certificates be renewed?

Every 2 years. Signup and view all the answers

If someone is following you too closely, what should you do?

Increase your following distance. Signup and view all the answers

Which of the following is not a characteristic of front tire failure?

Vehicle fishtail. Signup and view all the answers

Can you drive a vehicle transporting hazardous materials without a HAZMAT endorsement?

Yes, if the vehicle does not require placards. Signup and view all the answers

At 55 MPH on dry pavement, what is the approximate total stopping distance needed?

The length of a football field. Signup and view all the answers

What must you do when parked at the side of the road at night?

Turn on your 4-way emergency flashers to warn drivers. Signup and view all the answers

What is the term for a commercial vehicle's habit of swinging wide on turns?

Offtracking. Signup and view all the answers

What is the consequence for a first offense of driving a commercial vehicle under the influence?

You will lose your CDL for at least 1 year. Signup and view all the answers

Which piece of emergency equipment should be in your vehicle?

Warning devices for parked vehicles. Signup and view all the answers

What are containerized loads typically used for?

Freight carried part way by rail or ship. Signup and view all the answers

What can you check about a coolant container that is part of a pressurized system?

You can check the coolant level of a hot engine. Signup and view all the answers

What causes your vehicle's speed to naturally increase on downgrades?

Gravity. Signup and view all the answers

Which of these is not part of the engine compartment pre-trip inspection?

Valve clearance Signup and view all the answers

What should be true about brake shoes during inspections?

They should not have oil, grease, or brake fluid on them. Signup and view all the answers

What is counter-steering?

Turning the steering wheel back in the other direction after steering to avoid a traffic emergency. Signup and view all the answers

Backing a commercial vehicle is always dangerous.

True Signup and view all the answers

What should you use your mirrors for?

To check where the rear of your vehicle is when making turns. Signup and view all the answers

Which of these lights cannot be checked at the same time?

Four-way flashers Signup and view all the answers

What should you check about your tires in hot weather?

You should check tire mounting and air pressure before driving. Signup and view all the answers

What should you do when your vehicle hydroplanes?

Release the accelerator. Signup and view all the answers

After starting the engine, what should the coolant temperature gauge do?

Begin a gradual rise to normal. Signup and view all the answers

What is a true statement regarding the use of drugs while driving?

Prescription drugs are allowed if a doctor says the drugs will not affect safe driving ability. Signup and view all the answers

What should you do if you're unsure how to put out a hazardous material fire?

Wait for qualified firefighters. Signup and view all the answers

What is the safest way to merge onto a road?

Wait for a large enough gap in traffic to enter the road. Signup and view all the answers

What is true about speed management on slippery roads?

It takes longer to stop and is harder to turn without skidding. Signup and view all the answers

When driving a long vehicle, what should you do when turning left from one street into another?

Begin turning your vehicle when halfway through the intersection. Signup and view all the answers

If you need to leave the road in a traffic emergency, what should you avoid doing?

Avoid braking until your speed has dropped to about 20 MPH. Signup and view all the answers

What three things add up to the total stopping distance for your truck or bus?

Perception distance, reaction distance, braking distance. Signup and view all the answers

Which of these items is not checked in a pre-trip inspection?

Fuel level Signup and view all the answers

What should you do to warn other drivers of a stopped vehicle?

Move the rear reflective triangle back if the driver's vision is obscured within 500 feet. Signup and view all the answers

Which system should receive extra attention during a winter weather inspection?

Exhaust. Signup and view all the answers

Why should you take extra care to keep your vehicle centered in your lane?

Because commercial vehicles are often wider than other vehicles. Signup and view all the answers

What is the correct statement about emergency evasive action?

To turn quickly, you must have a firm grip on the steering wheel. Signup and view all the answers

How does vehicle weight affect stopping distance?

Empty trucks can take longer to stop than loaded trucks. Signup and view all the answers

Where must you keep shipping papers when transporting hazardous materials?

In a pouch on the driver's door or on the seat. Signup and view all the answers

What should you watch for when driving through roadway work zones?

Sharp pavement drop-offs. Signup and view all the answers

What is true about a vehicle's overhead clearance?

Cargo weight can change your vehicle's height. Signup and view all the answers

What should you do first if your vehicle's tire blows out on a straight, level highway at 50 MPH?

Stay off the brake until the vehicle has slowed down. Signup and view all the answers

What should you not do when caring for an injured person at an accident scene?

Keep injured persons cool. Signup and view all the answers

When roads are slippery, what should you do?

Make turns as carefully as possible. Signup and view all the answers

What should you do if hydraulic brakes fail?

Pump the brake to generate pressure. Signup and view all the answers

What is a good rule to follow when stopping a heavy vehicle on the shoulder while driving uphill?

Use the parking brake to hold the vehicle until the clutch engages. Signup and view all the answers

Which of these statements is not true about backing a heavy vehicle?

You should back slowly until you slightly bump into the dock. Signup and view all the answers

What is necessary to determine a person's blood alcohol concentration?

How much the person weighs. Signup and view all the answers

What is true about rear drive wheel braking skids?

Trailers can push the towing vehicle sideways. Signup and view all the answers

What is controlled braking?

Used to keep a vehicle in a straight line when braking. Signup and view all the answers

What happens when a tire blows out at highway speeds?

A vibrating feeling. Signup and view all the answers

How far ahead should a driver look while driving?

12-15 seconds. Signup and view all the answers

What is usually true about driving in tunnels?

There may be strong winds when exiting. Signup and view all the answers

What is the least amount of space a 40-foot vehicle should keep in front while driving at 30 MPH?

4 Seconds. Signup and view all the answers

What should you do with unstable loads when driving on curves?

Use extra caution. Signup and view all the answers

What is the total weight of the power unit, trailer, and cargo called?

Gross combination weight. Signup and view all the answers

Why should you limit the use of your horn?

It can startle other drivers. Signup and view all the answers

What can poor trailer ventilation cause?

Flammable cargo to catch fire. Signup and view all the answers

What should you assume when passing another vehicle, pedestrian, or bicyclist?

They may move into your traffic lane. Signup and view all the answers

What should you keep in mind about weather conditions when driving?

When the temperature drops, bridges will freeze before roads. Signup and view all the answers

What should be the safest speed when driving in heavy traffic at 35 MPH and the speed limit is 55 MPH?

35 MPH. Signup and view all the answers

What is a true statement about heavy vehicle accidents?

Many heavy vehicle accidents occur between midnight and 6 AM. Signup and view all the answers

What is true about brakes in terms of vehicle weight?

Brakes absorb more heat to stop heavier or faster-moving vehicles. Signup and view all the answers

Study Notes

Stab Braking

Stab braking involves applying and releasing brakes after wheels lock up to stabilize the vehicle.

Placards Requirements

Placards must be displayed on all four sides of the vehicle to indicate hazardous materials.

Turning Correctly

When turning, maintain a slight angle against traffic to ensure safe maneuvering.

Signaling While Turning

Continuous signaling during a turn is essential for safety, keeping both hands free for steering.

Highway Visibility

Drivers should look ahead approximately 1/4 mile when traveling at highway speeds.

Firefighting Basics

Water can only be used on certain fire types, such as tire fires, but not on others like electrical or flammable liquids.

Purpose of Retarders

Retarders assist in slowing down the vehicle during driving while minimizing wear on brakes.

Convex Mirrors

Convex mirrors provide a broader view compared to flat mirrors, enhancing driver visibility.

Manual Transmission on Downgrades

Lower gears should be used when descending long, steep grades for better control.

Overhead Clearance Concerns

If uncertain about overhead clearance, opt for an alternative route to avoid potential accidents.

Speed and Destructive Power

Doubling vehicle speed results in quadrupling the potential destructive power in a crash.

Steering Wheel Positioning

The steering wheel should be held with both hands on opposite sides for optimal control.

Night Driving Safety

Drive slowly and within the range of your headlights to allow for sufficient stopping time.

Vehicle Inspections and Fire Prevention

Checking battery fluid levels does not contribute to fire prevention during inspections.

Exhaust System Risks

A malfunctioning exhaust system can allow toxic fumes to enter the vehicle’s cabin.

Lane Change Precautions

Always confirm that no vehicles are in your blind spot before changing lanes.

Railroad Crossing Regulations

Stopping at a railroad crossing is required if the cargo mandates it by law.

Wet Brakes Consequences

Wet brakes can lead to dangerous situations such as trailer jackknifing.

Signing the application implies consent to alcohol testing, as it's required for drivers.

Vehicle Stops and Inspections

Hydraulic brakes should be checked while the vehicle is stationary for safety and accuracy.

Managing Fatigue

Sleep is the only effective remedy for driver fatigue; no other actions substitute for rest.

Causes of Serious Skids

Most serious skids occur due to excessive speed relative to road conditions.

Maintaining Brake Performance in Water

To preserve braking ability, gently apply brakes when traversing through water.

Steering System Play

Any steering wheel play exceeding 2 inches on a 20-inch wheel necessitates immediate repair.

Shifting Techniques

Use a tachometer during double-clutching to determine the correct shift timing.

Power Wheel Spin Response

If wheels start to spin while accelerating, ease off the accelerator to regain traction.

Uphill Exit Protocol

Slow down adequately before entering a downhill curved offramp while driving a heavy vehicle.

Hazard Management

Avoid tailgating or honking aggressively when another vehicle cuts in front.

Truck Escape Ramps

These ramps are designed to help heavy vehicles avoid accidents and damage.

Mirror Adjustments

Mirrors should be adjusted prior to travel for optimal visibility and safety.

Returning to Pavement on Shoulders

If forced onto the shoulder, come to a complete stop before safely merging back onto the road.

Daily Vehicle Inspections

Drivers must complete and sign a vehicle inspection report, especially if prior defects were noted.

Tire Tread in Cold Weather

Tire tread should maintain sufficient traction for navigating through snow in winter conditions.

CDL Medical Certificate Renewal

CDL medical certificates need to be renewed every two years for compliance.

Following Distance Strategy

Increase following distance to ensure safety when being tailgated by another vehicle.

Identifying Front Tire Failure

A characteristic of front tire failure is not fishtailing, which typically indicates rear tire issues.

HAZMAT Regulations

Driving HAZMAT carriers is permissible if no placarding is required by regulations.

Total Stopping Distance

At 55 MPH on dry pavement, approximately the length of a football field is needed for stopping.

Nighttime Parking Requirements

Utilize 4-way emergency flashers when parked at roadside during nighttime for visibility.

Offtracking Behavior

Commercial vehicles often swing wide on turns, known as offtracking, requiring careful navigation.

DUI Consequences

A first offense for DUI in a commercial vehicle results in at least a one-year CDL suspension.

Emergency Equipment Necessity

Warning devices must be carried in the vehicle for safety during stops.

Containerized Loads

Commonly used for rail or ship transport, containerized loads facilitate multi-modal freight handling.

Coolant System Checks

The coolant level of a hot engine can be checked only if the container is part of a pressurized system.

Speed Increase on Downgrades

Gravity causes natural increases in speed when driving downhill, demanding careful control.

Pre-Trip Inspection Exclusions

Valve clearance checks are not required during the engine compartment pre-trip inspection.

Brake System Inspection

Brake shoes must be free of any oil, grease, or brake fluid during pre-trip checks.

Counter-Steering Action

Counter-steering involves turning the wheel back in the opposite direction after avoiding hazards.

Backing a Commercial Vehicle

Backing is inherently risky; caution is required to ensure safety.

Mirror Utilization

Regularly check mirrors to know the vehicle's rear when executing turns.

Light Checks

Turn signals, brake lights, and four-way flashers cannot be checked simultaneously.

Hot Weather Tire Care

Monitor tire mounting and air pressure before driving in high temperatures.

Hydroplaning Response

Release the accelerator immediately to regain control when hydroplaning occurs.

Coolant Temperature Gauge

After starting the engine, the coolant temperature gauge should gradually rise to the normal range.

Prescription Drug Regulations

Driving under the influence of prescription drugs is permitted only if they don’t impair driving ability.

Hazardous Material Fires

In case of hazardous material fires, wait for trained firefighters to manage the situation.

Safe Merging Techniques

Safely merge onto roads by ensuring an adequate gap in traffic is present.

Speed Management on Slippery Roads

On slippery surfaces, longer stopping distances and turning difficulties are expected.

Wide Turn Maneuvering

For left turns from narrow streets, begin turning halfway through the intersection.

Emergency Off-Roading Guidelines

Avoid braking until speed drops to about 20 MPH if needing to leave the road during a traffic emergency.

Stopping Distance Contributions

Total stopping distance is made up of perception, reaction, and braking distance.

Pre-Trip Inspection Protocol

Fuel levels are generally not checked during pre-trip vehicle inspections.

Traffic Warning Regulations

Rear reflective triangles should be repositioned if the driver's vision is obscured within 500 feet.

Winter Inspection Focus

The exhaust system should be given special attention during inspections in cold weather.

Lane Centering Necessity

Maintain lane centering in commercial vehicles, often wider than standard cars, for safety.

Emergency Evasive Action Strategy

A firm grip on the steering wheel is necessary for making quick evasive maneuvers.

Vehicle Weight Influence on Stopping

Lighter trucks may have longer stopping distances than fully loaded counterparts.

Location for Shipping Papers

Keep shipping papers for hazardous materials readily accessible in the driver’s door pouch or on the seat.

Work Zone Traffic Guidelines

Watch for sharp drops in pavement when maneuvering through highway work zones.

Cargo Weight Considerations

The vehicle’s height may vary based on cargo weight, impacting overhead clearance requirements.

Response to Tire Blowouts

If a tire blows at highway speeds, remain off the brake until the vehicle naturally slows.

Accident Scene Care Guidelines

Avoid cooling injured individuals; provide warmth instead to prevent shock.

Slippery Roads Strategy

Tackle turns cautiously on slippery surfaces to maintain control and prevent skidding.

Responding to Hydraulic Brake Failure

To regain brake pressure during failure, pump the brake pedal to build up necessary force.

Uphill Vehicle Start Technique

Employ the parking brake to maintain vehicle position on an uphill incline while engaging the clutch.

Backing Safety Regulations

Backing too slowly until a slight impact with the dock is not recommended; proceed with caution.

Blood Alcohol Concentration Measurement

To assess blood alcohol levels, a person's weight is a critical factor.

Rear Wheel Braking Skid Implications

When rear drive wheel brakes skid, trailers may push the towing vehicle off-course.

Controlled Braking Technique

Controlled braking helps keep the vehicle stable and straight during the braking process.

High-Speed Tire Blowout Effects

A tire blowout at highway speeds typically causes a noticeable vibration throughout the vehicle.

Driver Attention Requirements

Maintain awareness by looking 12-15 seconds ahead while driving to anticipate situations.

Tunnel Driving Conditions

Strong winds can be expected when exiting tunnels, necessitating caution.

Safe Following Distance Calculation

A safe distance of 4 seconds should be maintained in front of vehicles for safe stopping, especially in large ones.

Cargo Management

Pay extra attention when transporting unstable loads on curves due to their potential for rolling.

Total Vehicle Weight Terminology

The entire weight of the power unit, trailer, and cargo is termed Gross Combination Weight.

Horn Use Recommendation

Limit horn usage as it can startle other road users and lead to dangerous situations.

Causes of Vehicle

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